Is＿necessary to tell his father everythi_爱下问搜题

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问题选择题

Is＿necessary to tell his father everything?

A．it

B．that

C．what

D．he

答案

答案：A

问答题简答题

内燃机的总体构造？

判断题

蚜虫是一类园林植物上主要的刺吸式害虫。